A large company wants to find out what team building activity it's employees prefer. Which of the following samples can give the most valid generalization

A. Surveys sent to all employees asking for their preferred team building activities

This sample can provide the most valid generalization because it allows all employees the opportunity to provide their input, ensuring that a broad range of preferences are taken into account.

Contact HR department if they have no clue, then bring in a questionnaire survey and then using world cloud generate a result and choose something that has more member in a team so they can collectively achieve and learn in large groups, as it is unlikely for a organisation of that size do operations in micro format.